I have a pronounced clunk noise when power is first applied to the rear drive train in both drive and reverse. It appears to be fine once under power and accelerates normally and I dont feel any abnormal vibration. I put the vehicle up on my lift today and thought I might find a bad rear bearing on one of the wheel hubs, but they both appear to be to tight when shaking the tires. There is some backlash on CV joints, but I wonder if that is normal play. I have approximately 45K miles and tires, brakes, wheels are all in good shape. Does anyone have any idea what I should try to investigate next?